Flange – Weld Neck, ANSI Class 1500, ASME B16.36, Orifice Weld Neck, Raised Face (in)

Dimensions and tolerances in accordance with ANSI/ASME B16.36 for sizes 1/2″ to 24″.
Carbon steel forgings in accordance with ASTM A105.
Bolt circle diameters are 1/8 inch larger than bolt diameter.
All dimensions except “Thickness of Flange C sizes 1″ are the same as a Weld Neck.
Approximate weight is based on a orifice flange union which is a set of flanges, plate not included.

Pipe Size(NPS)	OutsideDiameter of Flange A	Diameterof Raised Face B	Thicknessof Flange C	Diameterof Bore D	Diameterof Hub at Weld H	Diameterof Hub at Base J	Lengthof Hub K	Numberof Bolt Holes	Diameterof Bolt Holes	BoltCircle Diameter P	Approx.Weight Per Union (lb)
1/2	-	-	-	-	-	-	-	-	-	-	-
3/4	-	-	-	-	-	-	-	-	-	-	-
1	5 7/8	2	1 1/2	*	1.315	2 1/16	2 7/8	4	1	4	26
1 1/4	6 1/4	2 1/2	1 1/2	*	1.660	2 1/2	2 7/8	4	1	4 3/8	30
1 1/2	7	2 7/8	1 1/2	*	1.900	2 3/4	3 1/4	4	1 1/8	4 7/8	45
2	8 1/2	3 5/8	1 1/2	*	2.375	4 1/8	4	8	1	6 1/2	65
2 1/2	9 5/8	4 1/8	1 5/8	*	2.875	4 7/8	4 1/8	8	1 1/8	7 1/2	98
3	10 1/2	5	1 7/8	*	3.500	5 1/4	4 5/8	8	1 1/4	8	125
3 1/2	-	-	-	-	-	-	-	-	-	-	-
4	12 1/4	6 3/16	2 1/8	*	4.500	6 3/8	4 7/8	8	1 3/8	9 1/2	182
5	14 3/4	7 5/16	2 7/8	*	5.563	7 3/4	6 1/8	8	1 5/8	11 1/2	326
6	15 1/2	8 1/2	3 1/4	*	6.625	9	6 3/4	12	1 1/2	12 1/2	407
8	19	10 5/8	3 5/8	*	8.625	11 1/2	8 3/8	12	1 3/4	15 1/2	675
10	23	12 3/4	4 1/4	*	10.750	14 1/2	10	12	2	19	1099
12	26 1/2	15	4 7/8	*	12.750	17 3/4	11 1/8	16	2 1/8	22 1/2	1706
14	29 1/2	16 1/4	5 1/4	*	14.00	19 1/2	11 3/4	16	2 3/8	25	-
16	32 1/2	18 1/2	5 3/4	*	16.00	21 3/4	12 1/4	16	2 5/8	27 3/4	-
18	36	21	6 3/8	*	18.00	23 1/2	12 7/8	16	2 7/8	30 1/2	-
20	38 3/4	23	7	*	20.00	25 1/4	14	16	3 1/8	32 3/4	-
22	-	-	-	-	-	-	-	-	-	-	-
24	46	27 1/4	8	*	24.00	30	16	16	3 5/8	39	-